Air-heater for carbureters.



F. L. ROBINSON vL w. BELL.

AIR HEATER FOR CARBURETERS.

APPLICATION FILED SEPT. 2, 19|5. 1,170,337. Patented Feb. 1, 1916.

lllll lv abro/1,11 e134 l AIRHEATER FOR CARBURETERS.

,To all whom it may concern:

` Be it known that we," FREDERICK L. ROB'- y iNsoN and WALTER BELL, citizens of the United States, residing at Cheyenne, in'the county of Laramie and State of Wyoming, have invented certain new and useful Improvements in Air-Heaters for Carbureters;

to whichv it appertains to make and use the' same. v

This inventionrelates to improvements in air heaters for carbureters, and has for one object to provide a device of this character which will be extremely inexpensive to manufacture, yet which will be very efficient in operation.

Another object of our invention is to provide a simply constructed device by which the air used to Support combustion in the cylinders isheated by means of the waste heat from the exhaust pipe before it enters the carbureter.

A further object of our invention resides in providing a device by which the combustible mixture may be heated in its Way from the carbureter to the engine cylinders.

Vith the above and other objects in view,

vour invention consists of the novel features of construction, combination, and arrangement of parts which will be hereinafter more particularly described and claimed, and shown in the drawing wherein:

Figure l represents a side elevation ofa multiple cylinder engine showing our improved device applied thereto; Fig. 2 is a vertical transverse section through our air heaterand a portion of the engine cylinder taken on the line 2 2 of Fig. 1, and Fig. -3 is a horizontal section taken on the line 3-3 of Fig. 1.

In the accompanying drawing, E designates an internal combustion engine having both the intake manifold I and the exhaust manifold M on one ofits sides, the'exhaust manifold being shown connected to the usual exhaust pipe P. This arrangement of parts is provided on the engines ofFord automobiles and others, the manifolds being held in operative position on the side of the engine E by means of stud bolts 1 which project from the wall of the'engine cylinders between the inlet and outlet ends of the manifolds, 'said stud bolts being adapted to receive clamping yokes 2, the ends 3 of which Specification of Letters Patent.

Patented Feb. 1, 1916.

4.Implication led September 2, 1915. Serial No. 48,735.

contact with the adjacent surfaces of the manifolds for securing the same tothe engine. Clamping nuts 4 are threaded on the outer ends of the bolts 1 to secure the clamping yokes in contact with the ends of the manifolds. v

The foregoing construction comprises no part of the invention which resides broadly in inclosingvthe intake and exhaust mani-A folds within'a casing herein designated by the numeral 5. 'The top, bottom, and one side of the casing 5 is formed of a single piece of Sheet metal substantially rectangular in shape, the longitudinal edge portions of which are bent laterally to provide the top and bottom 6 and 7 respectively. The longitudinal edges of the top and bottom are provided with outturned flanges 8 vwhich are adapted to bear against the side of the engine E. yThe ends of this casing or box 5 are also formed of single pieces of sheet metal having their edges extended laterally to provide flanges 9', the outer surfaces of which bear against the inner faces of the before mentioned'portion of the casing and are secured thereto by the bolts l0 as shown in Fig. 3. the side of the engine, the flanges 8 of the top and bottom and the flanges 9 of the ends bearing against the flat surfaces of the engine to prevent any air from entering the box except through an opening 11 formed in the upper portion of one of the ends 9.

The intake manifold is connected in the Vusual manner with a carbureter C, the air as shownat 13 and is disposed directly uns der the junction of exhaust pipe P with the exhaust manifold M so that the air entering this intake will receive the full ad- 1 vantage of all heat given off from the ex- The open side of this box 5 abutshaust gases passing through the exhaust j Epe P From the foregoing description, 1t 1s ob- -vi ous that the air entering through the opening 11 must pass entirely across the exhaust manifold before entering the air inlet I2 of the carbureter C and thus becomes heated to a considerable extent' before mixing with the vapor within the carbureter, thereby enabling the combustible mixture to be more readily consumed. It is also evident that as the intake manifold is also inclosed Within the casing 5, the combustible mixture on its Way from the carbureter to the engine cylinders Will become reheated because of the -Waste gases of combustion passing through the exhaust manifold on their Way to the pipe P. In order to obtain full benelit of the heat given off by the exhaust manifold, We preferably line the interior of the box with the asbestos sheets 16.

The casing or box 5 maybe secured by any preferred means to the side ofthe engine, but in the Ford type of engine and those of similar nature, the stud bolts 1 may be extended through openings 14 in the side of the casing 5 and provided with the nuts 15 on their threaded end's. By tightening these nuts 15, the flanges 8 and 9 may be tightly clamped against the Wall of the engine E.

From the foregoing description,l taken in connection With the accompanying drawings, it will be seen that We have produced `a device by which the air before entering the carbureter may be heated bythe Waste gases of combustion and that the combustible mixture after leaving the carbureter may be still further heated by the same means.

While We have described the elements best adapted to perform the functions of our invention, it is obvious that various Changes in form, proportion, and the minor details of construction may be resorted to Within the scope of the appended claims Without departing from the spirit or sacrificing any of the principles of the invention.

Having thus described our invention, what We claim is:

1. The combination With an internal combustion engine having the intake and exhaust manifolds on one of its sides: of a casing surrounding said manifolds and having an open side abutting the side ofthe engine, a

carbureter connected to the intake manifold,l an air intake for said carbureter disposed Within said casing, said casing also having an air inlet and means for attaching said casing to .the engine.

2. The combination with an internal co bustion engine having intake and exhaust manifolds on one of its sides; of a casing surrounding said manifolds and having an open side abutting the side of the engine, a carbureter connected to the intake manifold, an air 'intake for said/carbureter extending Within said casing, said air intake having a flared open end disposed adjacent the exhaust pipe at one end of the casing, the opposite end of said casing having an air inlet adjacent its top, and means for attaching said casing to the engine.

3. The combination With an internal combustion engine having intake and exhaust manifoldson one of its sides; of stud bolts extending from the side of said engine between the inlet and outlet ends of the manifolds, clamping yokes on said stud bolts for attaching manifolds to the engine, nuts on the threaded end of said bolts for maintaining the manifolds in operative position, a casing surrounding said manifolds and having an open side abutting the side of the engine, said casing having a plurality of openings therein adapted to receive the outer ends of said stud bolts, nuts on the ends of said bolts for holding the casing in operative position, a carbureter connected to said intake manifold, an air intake for said carbureter opening- Within the casing, said cas- -ing having an airinlet in its opposite end.

4. The combination With an internal coinbustion engine having intake and exhaust manifolds on one of its sides; of a casing surrounding said manifolds and comprising a box Whose top and bottom and one side are formed of a single piece of sheet metal ,substantially rectangular in shape, the longitudinal edge portions of Which are bent laterally to provide said top and bottom,

.laterally extending flanges formed on the longitudinal. free edges of the top and bottom and adapted to bear against the side of the engine, ends formed of single pieces of sheet metal, the edges of Which have laterally extending flanges adapted to bear against the inner surfaces of the first-mentioned part of the box, and to 4be secured thereto, one of said ends having an air inlet formed therethrough, a carbureter connected to the intake manifold, an air intake for the carbureter opening linto said box, the opening being disposed at the opposite end of the casing from the air inlet, and means for attaching said casing to the engine.

In testimony whereof We have hereunto set our hands in presence of tvvo subscribing Witnesses.

FREDERICK L. ROBINSON. WALTER BELL. f Witnesses:

REINHARD -I-I. FAsoN, EARL E. YINGsT. 

